<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="utf-8">
	<meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" name="viewport">
	<title>LED Settings</title>
	<script>
		var d=document,laprev=55,maxB=1,maxV=0,maxM=4000,maxPB=4096,maxL=1333,maxLbquot=0; //maximum bytes for LED allocation: 4kB for 8266, 32kB for 32
		d.um_p = [];
		d.rsvd = [];
		d.ro_gpio = [];
		d.max_gpio = 50;
		var customStarts=false,startsDirty=[],maxCOOverrides=5;
		var loc = false, locip, locproto = "http:";
		function H(){window.open("https://kno.wled.ge/features/settings/#led-settings");}
		function B(){window.open(getURL("/settings"),"_self");}
		function gId(n){return d.getElementById(n);}
		function off(n){d.getElementsByName(n)[0].value = -1;}
		// https://www.educative.io/edpresso/how-to-dynamically-load-a-js-file-in-javascript
		function loadJS(FILE_URL, async = true) {
			let scE = d.createElement("script");
			scE.setAttribute("src", FILE_URL);
			scE.setAttribute("type", "text/javascript");
			scE.setAttribute("async", async);
			d.body.appendChild(scE);
			// success event 
			scE.addEventListener("load", () => {
				GetV();
				checkSi();
				setABL();
				d.Sf.addEventListener("submit", trySubmit);
				if (d.um_p[0]==-1) d.um_p.shift();
				pinDropdowns();
			});
			// error event
			scE.addEventListener("error", (ev) => {
				console.log("Error on loading file", ev);
				alert("Loading of configuration script failed.\nIncomplete page data!");
			});
		}
		var timeout;
		function showToast(text, error = false)
		{
			var x = gId("toast");
			x.innerHTML = text;
			x.className = error ? "error":"show";
			clearTimeout(timeout);
			x.style.animation = 'none';
			timeout = setTimeout(function(){ x.className = x.className.replace("show", ""); }, 2900);
		}
		function bLimits(b,v,p,m,l) {
			maxB = b; maxV = v; maxM = m; maxPB = p; maxL = l;
		}
		function pinsOK() {
			var LCs = d.Sf.querySelectorAll("#mLC input[name^=L]"); // input fields
			for (i=0; i<LCs.length; i++) {
				var nm = LCs[i].name.substring(0,2);
				// ignore IP address
				if (nm=="L0" || nm=="L1" || nm=="L2" || nm=="L3") {
					var n = LCs[i].name.substring(2);
					var t = parseInt(d.getElementsByName("LT"+n)[0].value, 10); // LED type SELECT
					if (t>=80) continue;
				}
				//check for pin conflicts
				if (nm=="L0" || nm=="L1" || nm=="L2" || nm=="L3" || nm=="L4"/* || nm=="RL" || nm=="BT" || nm=="IR"*/)
					if (LCs[i].value!="" && LCs[i].value!="-1") {
						var p = d.rsvd.concat(d.um_p); // used pin array
						d.Sf.querySelectorAll("select.pin").forEach((e)=>{if(e.value>-1)p.push(parseInt(e.value));}) // buttons, IR & relay
						if (p.some((e)=>e==parseInt(LCs[i].value))) {
							alert(`Sorry, pins ${JSON.stringify(p)} can't be used.`);
							LCs[i].value="";
							LCs[i].focus();
							return false;
						}
						else if (/*!(nm == "IR" || nm=="BT") &&*/ d.ro_gpio.some((e)=>e==parseInt(LCs[i].value))) {
							alert(`Sorry, pins ${JSON.stringify(d.ro_gpio)} are input only.`);
							LCs[i].value="";
							LCs[i].focus();
							return false;
						}
						for (j=i+1; j<LCs.length; j++) {
							var n2 = LCs[j].name.substring(0,2);
							if (n2=="L0" || n2=="L1" || n2=="L2" || n2=="L3" || n2=="L4"/* || n2=="RL" || n2=="BT" || n2=="IR"*/) {
								if (n2.substring(0,1)==="L") {
									var m  = LCs[j].name.substring(2);
									var t2 = parseInt(d.getElementsByName("LT"+m)[0].value, 10);
									if (t2>=80) continue;
								}
								if (LCs[j].value!="" && LCs[i].value==LCs[j].value) {
									alert(`Pin conflict between ${LCs[i].name}/${LCs[j].name}!`);
									LCs[j].value="";
									LCs[j].focus();
									return false;
								}
							}
						}
					}
			}
			return true;
		}
		function trySubmit(e) {
			d.Sf.data.value = '';
			e.preventDefault();
			if (!pinsOK()) {e.stopPropagation();return false;} // Prevent form submission and contact with server
			if (bquot > 100) {var msg = "Too many LEDs for me to handle!"; if (maxM < 10000) msg += "\n\rConsider using an ESP32."; alert(msg);}
			if (d.Sf.checkValidity()) d.Sf.submit(); //https://stackoverflow.com/q/37323914
		}
		function enABL()
		{
			var en = gId('able').checked;
			d.Sf.LA.value = (en) ? laprev:0;
			gId('abl').style.display = (en) ? 'inline':'none';
			gId('psu2').style.display = (en) ? 'inline':'none';
			if (d.Sf.LA.value > 0) setABL();
			UI();
		}
		function enLA()
		{
			var val = d.Sf.LAsel.value;
			d.Sf.LA.value = val;
			gId('LAdis').style.display = (val == 50) ? 'inline':'none';
			UI();
		}
		function setABL()
		{
			gId('able').checked = true;
			d.Sf.LAsel.value = 50;
			switch (parseInt(d.Sf.LA.value)) {
				case 0: gId('able').checked = false; enABL(); break;
				case 30: d.Sf.LAsel.value = 30; break;
				case 35: d.Sf.LAsel.value = 35; break;
				case 55: d.Sf.LAsel.value = 55; break;
				case 255: d.Sf.LAsel.value = 255; break;
				default: gId('LAdis').style.display = 'inline';
			}
			gId('m1').innerHTML = maxM;
		}
		//returns mem usage
		function getMem(t, n) {
			let len = parseInt(d.getElementsByName("LC"+n)[0].value);
			len += parseInt(d.getElementsByName("SL"+n)[0].value); // skipped LEDs are allocated too
			let dbl = 0;
			if (d.Sf.LD.checked) dbl = len * 4;	// double buffering
			if (t < 32) {
				if (t==26 || t==29) len *= 2; // 16 bit LEDs
				if (maxM < 10000 && d.getElementsByName("L0"+n)[0].value == 3) { //8266 DMA uses 5x the mem
					if (t > 28) return len*20 + dbl; //RGBW
					return len*15 + dbl;
				} else if (maxM >= 10000) //ESP32 RMT uses double buffer?
				{
					if (t > 28) return len*8 + dbl; //RGBW
					return len*6 + dbl;
				}
				if (t > 28) return len*4 + dbl; //RGBW
				return len*3 + dbl;
			}
			if (t > 31 && t < 48) return 5;	// analog
			return len*3 + dbl;
		}

		function UI(change=false)
		{
			let isRGBW = false, gRGBW = false, memu = 0;

			gId('ampwarning').style.display = (d.Sf.MA.value > 7200) ? 'inline':'none';

			if (d.Sf.LA.value == 255) laprev = 12;
			else if (d.Sf.LA.value > 0) laprev = d.Sf.LA.value;

			// enable/disable LED fields
			d.Sf.querySelectorAll("#mLC select[name^=LT]").forEach((s)=>{
				// is the field a LED type?
				var n = s.name.substring(2);
				var t = parseInt(s.value);
				gId("p0d"+n).innerHTML = (t>=80 && t<96) ? "IP address:" : (t > 49) ? "Data GPIO:" : (t > 41) ? "GPIOs:" : "GPIO:";
				gId("p1d"+n).innerHTML = (t> 49 && t<64) ? "Clk GPIO:" : "";
				//var LK = d.getElementsByName("L1"+n)[0]; // clock pin

				memu += getMem(t, n); // calc memory

				// enumerate pins
				for (p=1; p<5; p++) {
					var LK = d.getElementsByName("L"+p+n)[0]; // secondary pins
					if (!LK) continue;
					if (((t>=80 && t<96) && p<4) || (t>49 && p==1) || (t>41 && t < 50 && (p+40 < t))) // TYPE_xxxx values from const.h
					{
						// display pin field
						LK.style.display = "inline";
						LK.required = true;
					} else {
						// hide pin field
						LK.style.display = "none";
						LK.required = false;
						LK.value="";
					}
				}
				if (change) {
					gId("rf"+n).checked = (gId("rf"+n).checked || t == 31); // LEDs require data in off state
					if (t > 31 && t < 48) d.getElementsByName("LC"+n)[0].value = 1; // for sanity change analog count just to 1 LED
				}
				gId("rf"+n).onclick = (t == 31) ? (()=>{return false}) : (()=>{});  // prevent change for TM1814
				gRGBW |= isRGBW = ((t > 17 && t < 22) || (t > 28 && t < 32) || (t > 40 && t < 46 && t != 43) || t == 88); // RGBW checkbox, TYPE_xxxx values from const.h
				gId("co"+n).style.display = ((t >= 80 && t < 96) || (t >= 40 && t < 48)) ? "none":"inline";  // hide color order for PWM
				gId("dig"+n+"w").style.display = (t > 28 && t < 32) ? "inline":"none";  // show swap channels dropdown
				if (!(t > 28 && t < 32)) d.getElementsByName("WO"+n)[0].value = 0; // reset swapping
				gId("dig"+n+"c").style.display = (t >= 40 && t < 48) ? "none":"inline";  // hide count for analog
				gId("dig"+n+"r").style.display = (t >= 80 && t < 96) ? "none":"inline";  // hide reversed for virtual
				gId("dig"+n+"s").style.display = ((t >= 80 && t < 96) || (t >= 40 && t < 48)) ? "none":"inline";  // hide skip 1st for virtual & analog
				gId("dig"+n+"f").style.display = ((t >= 16 && t < 32) || (t >= 50 && t < 64)) ? "inline":"none";  // hide refresh
				gId("dig"+n+"a").style.display = (isRGBW && t != 40) ? "inline":"none";  // auto calculate white
				gId("dig"+n+"l").style.display = (t > 48 && t < 64) ? "inline":"none";  // bus clock speed
				gId("rev"+n).innerHTML = (t >= 40 && t < 48) ? "Inverted output":"Reversed (rotated 180°)";  // change reverse text for analog
				gId("psd"+n).innerHTML = (t >= 40 && t < 48) ? "Index:":"Start:";    // change analog start description
			});
			// display global white channel overrides
			gId("wc").style.display = (gRGBW) ? 'inline':'none';
			if (!gRGBW) {
				d.Sf.AW.selectedIndex = 0;
				d.Sf.CR.checked = false;
			}
			// check for pin conflicts
			var LCs = d.Sf.querySelectorAll("#mLC input[name^=L]"); // input fields
			var sLC = 0, sPC = 0, maxLC = 0;
			for (i=0; i<LCs.length; i++) {
				var nm = LCs[i].name.substring(0,2);  // field name
				var n  = LCs[i].name.substring(2);    // bus number
				// do we have a led count field
				if (nm=="LC") {
					var c=parseInt(LCs[i].value,10); //get LED count
					if (!customStarts || !startsDirty[n]) gId("ls"+n).value=sLC; //update start value
					gId("ls"+n).disabled = !customStarts; //enable/disable field editing
					if(c){
						var s = parseInt(gId("ls"+n).value); //start value
						if (s+c > sLC) sLC = s+c; //update total count
						if(c>maxLC)maxLC=c; //max per output
						var t = parseInt(d.getElementsByName("LT"+n)[0].value); // LED type SELECT
						if (t<80) sPC+=c; //virtual out busses do not count towards physical LEDs
					} // increase led count
					continue;
				}
				// do we have led pins for digital leds
				if (nm=="L0" || nm=="L1") {
					var lc=d.getElementsByName("LC"+n)[0];
					lc.max=maxPB; // update max led count value
				}
				// ignore IP address (stored in pins for virtual busses)
				if (nm=="L0" || nm=="L1" || nm=="L2" || nm=="L3") {
					var t = parseInt(d.getElementsByName("LT"+n)[0].value); // LED type SELECT
					if (t>=80) {
						LCs[i].max = 255;
						LCs[i].min = 0;
						LCs[i].style.color="#fff";
						continue; // do not check conflicts
					} else {
						LCs[i].max = d.max_gpio;
						LCs[i].min = -1;
					}
				}
				// check for pin conflicts
				if (nm=="L0" || nm=="L1" || nm=="L2" || nm=="L3" || nm=="L4"/* || nm=="RL" || nm=="BT" || nm=="IR"*/)
					if (LCs[i].value!="" && LCs[i].value!="-1") {
						var p = d.rsvd.concat(d.um_p); // used pin array
						d.Sf.querySelectorAll("select.pin").forEach((e)=>{if(e.value>-1)p.push(parseInt(e.value));}) // buttons, IR & relay
						for (j=0; j<LCs.length; j++) {
							if (i==j) continue;
							var n2 = LCs[j].name.substring(0,2);
							if (n2=="L0" || n2=="L1" || n2=="L2" || n2=="L3" || n2=="L4"/* || n2=="RL" || n2=="BT" || n2=="IR"*/) {
								if (n2.substring(0,1)==="L") {
									var m  = LCs[j].name.substring(2);
									var t2 = parseInt(d.getElementsByName("LT"+m)[0].value, 10);
									if (t2>=80) continue;
								}
								if (LCs[j].value!="" && LCs[j].value!="-1") p.push(parseInt(LCs[j].value,10));  // add current pin
							}
						}
						// now check for conflicts
						if (p.some((e)=>e==parseInt(LCs[i].value))) LCs[i].style.color="red"; else LCs[i].style.color=d.ro_gpio.some((e)=>e==parseInt(LCs[i].value))?"orange":"#fff";
					}
				// check buttons, IR & relay
				//if (nm=="IR" || nm=="BT" || nm=="RL") {
				//	LCs[i].max = d.max_gpio;
				//	LCs[i].min = -1;
				//}
			}
			// update total led count
			gId("lc").textContent = sLC;
			gId("pc").textContent = (sLC == sPC) ? "":"(" + sPC + " physical)";

			// memory usage and warnings
			gId('m0').innerHTML = memu;
			bquot = memu / maxM * 100;
			gId('dbar').style.background = `linear-gradient(90deg, ${bquot > 60 ? (bquot > 90 ? "red":"orange"):"#ccc"} 0 ${bquot}%, #444 ${bquot}% 100%)`;
			gId('ledwarning').style.display = (maxLC > Math.min(maxPB,800) || bquot > 80) ? 'inline':'none';
			gId('ledwarning').style.color = (maxLC > Math.max(maxPB,800) || bquot > 100) ? 'red':'orange';
			gId('wreason').innerHTML = (bquot > 80) ? "80% of max. LED memory" +(bquot>100 ? ` (<b>ERROR: Using over ${maxM}B!</b>)` : "") : "800 LEDs per output";
			// calculate power
			var val = Math.ceil((100 + sPC * laprev)/500)/2;
			val = (val > 5) ? Math.ceil(val) : val;
			var s = "";
			var is12V = (d.Sf.LAsel.value == 30);
			var isWS2815 = (d.Sf.LAsel.value == 255);
			if (val < 1.02 && !is12V && !isWS2815)
			{
				s = "ESP 5V pin with 1A USB supply";
			} else
			{
				s += is12V ? "12V ": isWS2815 ? "WS2815 12V " : "5V ";
				s += val;
				s += "A supply connected to LEDs";
			}
			var val2 = Math.ceil((100 + sPC * laprev)/1500)/2;
			val2 = (val2 > 5) ? Math.ceil(val2) : val2;
			var s2 = "(for most effects, ~";
			s2 += val2;
			s2 += "A is enough)<br>";
			gId('psu').innerHTML = s;
			gId('psu2').innerHTML = isWS2815 ? "" : s2;
			gId("json").style.display = d.Sf.IT.value==8 ? "" : "none";
		}
		function lastEnd(i) {
			if (i<1) return 0;
			v = parseInt(d.getElementsByName("LS"+(i-1))[0].value) + parseInt(d.getElementsByName("LC"+(i-1))[0].value);
			var t = parseInt(d.getElementsByName("LT"+(i-1))[0].value);
			if (t > 31 && t < 48) v = 1; //PWM busses
			if (isNaN(v)) return 0;
			return v;
		}
		function addLEDs(n,init=true)
		{
			var o = d.getElementsByClassName("iST");
			var i = o.length;

			if ((n==1 && i>=maxB+maxV) || (n==-1 && i==0)) return;

			var f = gId("mLC");
			if (n==1) {
// npm run build has trouble minimizing spaces inside string
				var cn = `<div class="iST">
<hr class="sml">
${i+1}:
<select name="LT${i}" onchange="UI(true)">${i>=maxB ? '' :
'<option value="22" selected>WS281x</option>\
<option value="30">SK6812/WS2814 RGBW</option>\
<option value="31">TM1814</option>\
<option value="24">400kHz</option>\
<option value="25">TM1829</option>\
<option value="26">UCS8903</option>\
<option value="29">UCS8904 RGBW</option>\
<option value="50">WS2801</option>\
<option value="51">APA102</option>\
<option value="52">LPD8806</option>\
<option value="54">LPD6803</option>\
<option value="53">P9813</option>\
<option value="19">WS2811 White</option>\
<option value="40">On/Off</option>\
<option value="41">PWM White</option>\
<option value="42">PWM CCT</option>\
<option value="43">PWM RGB</option>\
<option value="44">PWM RGBW</option>\
<option value="45">PWM RGB+CCT</option>\
<!--option value="46">PWM RGB+DCCT</option-->'}
<option value="80">DDP RGB (network)</option>
<!--option value="81">E1.31 RGB (network)</option-->
<option value="82">Art-Net RGB (network)</option>
<option value="88">DDP RGBW (network)</option>
</select><br>
<div id="co${i}" style="display:inline">Color Order:
<select name="CO${i}">
<option value="0">GRB</option>
<option value="1">RGB</option>
<option value="2">BRG</option>
<option value="3">RBG</option>
<option value="4">BGR</option>
<option value="5">GBR</option>
</select></div>
<div id="dig${i}w" style="display:none">Swap: <select name="WO${i}"><option value="0">None</option><option value="1">W & B</option><option value="2">W & G</option><option value="3">W & R</option></select></div>
<div id="dig${i}l" style="display:none">Clock: <select name="SP${i}"><option value="0">Slowest</option><option value="1">Slow</option><option value="2">Normal</option><option value="3">Fast</option><option value="4">Fastest</option></select></div>
<div>
<span id="psd${i}">Start:</span> <input type="number" name="LS${i}" id="ls${i}" class="l starts" min="0" max="8191" value="${lastEnd(i)}" oninput="startsDirty[${i}]=true;UI();" required />&nbsp;
<div id="dig${i}c" style="display:inline">Length: <input type="number" name="LC${i}" class="l" min="1" max="${maxPB}" value="1" required oninput="UI()" /></div><br>
</div>
<span id="p0d${i}">GPIO:</span><input type="number" name="L0${i}" required class="s" onchange="UI();pinUpd(this);"/>
<span id="p1d${i}"></span><input type="number" name="L1${i}" class="s" onchange="UI();pinUpd(this);"/>
<span id="p2d${i}"></span><input type="number" name="L2${i}" class="s" onchange="UI();pinUpd(this);"/>
<span id="p3d${i}"></span><input type="number" name="L3${i}" class="s" onchange="UI();pinUpd(this);"/>
<span id="p4d${i}"></span><input type="number" name="L4${i}" class="s" onchange="UI();pinUpd(this);"/>
<div id="dig${i}r" style="display:inline"><br><span id="rev${i}">Reversed</span>: <input type="checkbox" name="CV${i}"></div>
<div id="dig${i}s" style="display:inline"><br>Skip first LEDs: <input type="number" name="SL${i}" min="0" max="255" value="0" oninput="UI()"></div>
<div id="dig${i}f" style="display:inline"><br>Off Refresh: <input id="rf${i}" type="checkbox" name="RF${i}"></div>
<div id="dig${i}a" style="display:inline"><br>Auto-calculate white channel from RGB:<br><select name="AW${i}"><option value=0>None</option><option value=1>Brighter</option><option value=2>Accurate</option><option value=3>Dual</option><option value=4>Max</option></select>&nbsp;</div>
</div>`;
				f.insertAdjacentHTML("beforeend", cn);
			}
			if (n==-1) {
				o[--i].remove();--i;
			}

			gId("+").style.display = (i<maxB+maxV-1) ? "inline":"none";
			gId("-").style.display = (i>0) ? "inline":"none";

			if (!init) UI();
		}

		function addCOM(start=0,len=1,co=0) {
			var i = d.getElementsByClassName("com_entry").length;
			if (i >= 10) return;

			var b = `<div class="com_entry">
<hr class="sml">
${i+1}: Start: <input type="number" name="XS${i}" id="xs${i}" class="l starts" min="0" max="65535" value="${start}" oninput="UI();" required="">&nbsp;
Length: <input type="number" name="XC${i}" id="xc${i}" class="l" min="1" max="65535" value="${len}" required="" oninput="UI()">
<div style="display:inline">Color Order:
<select id="xo${i}" name="XO${i}">
<option value="0">GRB</option>
<option value="1">RGB</option>
<option value="2">BRG</option>
<option value="3">RBG</option>
<option value="4">BGR</option>
<option value="5">GBR</option>
</select>
</div><br></div>`;
			gId("com_entries").insertAdjacentHTML("beforeend", b);
			gId("xo"+i).value = co;
			btnCOM(i+1);
			UI();
		}

		function remCOM() {
			var entries = d.getElementsByClassName("com_entry");
			var i = entries.length;
			if (i === 0) return;
			entries[i-1].remove();
			btnCOM(i-1);
			UI();
		}

		function resetCOM(_newMaxCOOverrides=undefined) {
			if (_newMaxCOOverrides) {
				maxCOOverrides = _newMaxCOOverrides;
			}
			for (let e of d.getElementsByClassName("com_entry")) {
				e.remove();
			}
			btnCOM(0);
		}

		function btnCOM(i) {
			gId("com_add").style.display = (i<maxCOOverrides) ? "inline":"none";
			gId("com_rem").style.display = (i>0) ? "inline":"none";
		}

		function addBtn(i,p,t) {
			var c = gId("btns").innerHTML;
			var bt = "BT" + String.fromCharCode((i<10?48:55)+i);
			var be = "BE" + String.fromCharCode((i<10?48:55)+i);
			c += `Button ${i} GPIO: <input type="number" name="${bt}" onchange="UI()" class="xs" value="${p}">`;
			c += `&nbsp;<select name="${be}">`
			c += `<option value="0" ${t==0?"selected":""}>Disabled</option>`;
			c += `<option value="2" ${t==2?"selected":""}>Pushbutton</option>`;
			c += `<option value="3" ${t==3?"selected":""}>Push inverted</option>`;
			c += `<option value="4" ${t==4?"selected":""}>Switch</option>`;
			c += `<option value="5" ${t==5?"selected":""}>PIR sensor</option>`;
			c += `<option value="6" ${t==6?"selected":""}>Touch</option>`;
			c += `<option value="7" ${t==7?"selected":""}>Analog</option>`;
			c += `<option value="8" ${t==8?"selected":""}>Analog inverted</option>`;
			c += `</select>`;
			c += `<span style="cursor: pointer;" onclick="off('${bt}')">&nbsp;&#x2715;</span><br>`;
			gId("btns").innerHTML = c;
		}
		function tglSi(cs) {
			customStarts = cs;
			if (!customStarts) startsDirty = []; //set all starts to clean
			UI();
		}
		function checkSi() { //on load, checks whether there are custom start fields
			var cs = false;
			for (var i=1; i < d.getElementsByClassName("iST").length; i++) {
				var v = parseInt(gId("ls"+(i-1)).value) + parseInt(d.getElementsByName("LC"+(i-1))[0].value);
				if (v != parseInt(gId("ls"+i).value)) {cs = true; startsDirty[i] = true;}
			}
			if (gId("ls0") && parseInt(gId("ls0").value) != 0) {cs = true; startsDirty[0] = true;}
			gId("si").checked = cs;
			tglSi(cs);
		}
		function uploadFile(name) {
			var req = new XMLHttpRequest();
			req.addEventListener('load', function(){showToast(this.responseText,this.status >= 400)});
			req.addEventListener('error', function(e){showToast(e.stack,true);});
			req.open("POST", "/upload");
			var formData = new FormData();
			formData.append("data", d.Sf.data.files[0], name);
			req.send(formData);
			d.Sf.data.value = '';
			return false;
		}
		// https://stackoverflow.com/questions/7346563/loading-local-json-file
		function loadCfg(o) {
			var f, fr;

			if (typeof window.FileReader !== 'function') {
				alert("The file API isn't supported on this browser yet.");
				return;
			}

			if (!o.files) {
				alert("This browser doesn't support the `files` property of file inputs.");
			} else if (!o.files[0]) {
				alert("Please select a JSON file first!");
			} else {
				f = o.files[0];
				fr = new FileReader();
				fr.onload = receivedText;
				fr.readAsText(f);
			}
			o.value = '';

			function receivedText(e) {
				let lines = e.target.result;
				var c = JSON.parse(lines); 
				if (c.hw) {
					if (c.hw.led) {
						for (var i=0; i<10; i++) addLEDs(-1);
						var l = c.hw.led;
						l.ins.forEach((v,i,a)=>{
							addLEDs(1);
							for (var j=0; j<v.pin.length; j++) d.getElementsByName(`L${j}${i}`)[0].value = v.pin[j];
							d.getElementsByName("LT"+i)[0].value = v.type;
							d.getElementsByName("LS"+i)[0].value = v.start;
							d.getElementsByName("LC"+i)[0].value = v.len;
							d.getElementsByName("CO"+i)[0].value = v.order;
							d.getElementsByName("SL"+i)[0].value = v.skip;
							d.getElementsByName("RF"+i)[0].checked = v.ref;
							d.getElementsByName("CV"+i)[0].checked = v.rev;
						});
					}
					if(c.hw.com) {
						resetCOM();
						c.hw.com.forEach(e => {
							addCOM(e.start, e.len, e.order);
						});
					}
					if (c.hw.btn) {
						var b = c.hw.btn;
						if (Array.isArray(b.ins)) gId("btns").innerHTML = "";
						b.ins.forEach((v,i,a)=>{
							addBtn(i,v.pin[0],v.type);
						});
						d.getElementsByName("TT")[0].value = b.tt;
					}
					if (c.hw.ir) {
						d.getElementsByName("IR")[0].value = c.hw.ir.pin;
						d.getElementsByName("IT")[0].value = c.hw.ir.type;
					}
					if (c.hw.relay) {
						d.getElementsByName("RL")[0].value = c.hw.relay.pin;
						d.getElementsByName("RM")[0].checked = c.hw.relay.inv;
					}
					UI();
				}
			}
		}
		function pinDropdowns() {
			let fields = ["IR","RL"]; // IR & relay
			gId("btns").querySelectorAll('input[type="number"]').forEach((e)=>{fields.push(e.name);}) // buttons
			for (let i of d.Sf.elements) {
				if (i.type === "number" && fields.includes(i.name)) { //select all pin select elements
					let v = parseInt(i.value);
					let sel = addDropdown(i.name,0);
					for (var j = -1; j <= d.max_gpio; j++) {
						if (d.rsvd.includes(j)) continue;
						let foundPin = d.um_p.indexOf(j);
						let txt = (j === -1) ? "unused" : `${j}`;
						if (foundPin >= 0 && j !== v) txt += ` used`; // already reserved pin
						if (d.ro_gpio.includes(j)) txt += " (R/O)";
						let opt = addOption(sel, txt, j);
						if (j === v) opt.selected = true; // this is "our" pin
						else if (d.um_p.includes(j)) opt.disabled = true; // someone else's pin
					}
				}
			}
			// update select options
			d.Sf.querySelectorAll("select.pin").forEach((e)=>{pinUpd(e);});
			// add dataset values for LED GPIO pins
			d.Sf.querySelectorAll(".iST input.s[name^=L]").forEach((i)=>{
				if (i.value!=="" && i.value>=0)
					i.dataset.val = i.value;
			});
		}
		function pinUpd(e) {
			// update changed select options across all usermods
			let oldV = parseInt(e.dataset.val);
			e.dataset.val = e.value;
			let txt = e.name;
			let pins = [];
			d.Sf.querySelectorAll(".iST input.s[name^=L]").forEach((i)=>{
				if (i.value!=="" && i.value>=0 && i.max<255)
					pins.push(i.value);
			});
			let selects = d.Sf.querySelectorAll("select.pin");
			for (let sel of selects) {
				if (sel == e) continue
				Array.from(sel.options).forEach((i)=>{
					let led = pins.includes(i.value);
					if (!(i.value==oldV || i.value==e.value || led)) return;
					if (i.value == -1) {
						i.text = "unused";
						return
					}
					i.text = i.value;
					if (i.value==oldV) {
						i.disabled = false;
					}
					if (i.value==e.value || led) {
						i.disabled = true;
						i.text += ` ${led?'LED':txt}`;
					}
					if (d.ro_gpio.includes(parseInt(i.value))) i.text += " (R/O)";
				});
			}
		}
		// https://stackoverflow.com/questions/39729741/javascript-change-input-text-to-select-option
		function addDropdown(field) {
			let sel = d.createElement('select');
			sel.classList.add("pin");
			let inp = d.getElementsByName(field)[0];
			if (inp && inp.tagName === "INPUT" && (inp.type === "text" || inp.type === "number")) {  // may also use nodeName
				let v = inp.value;
				let n = inp.name;
				// copy the existing input element's attributes to the new select element
				for (var i = 0; i < inp.attributes.length; ++ i) {
					var att = inp.attributes[i];
					// type and value don't apply, so skip them
					// ** you might also want to skip style, or others -- modify as needed **
					if (att.name != 'type' && att.name != 'value' && att.name != 'class' && att.name != 'style') {
						sel.setAttribute(att.name, att.value);
					}
				}
				sel.setAttribute("data-val", v);
				sel.setAttribute("onchange", "pinUpd(this)");
				// finally, replace the old input element with the new select element
				inp.parentElement.replaceChild(sel, inp);
				return sel;
			}
			return null;
		}
		function addOption(sel,txt,val) {
			if (sel===null) return; // select object missing
			let opt = d.createElement("option");
			opt.value = val;
			opt.text = txt;
			sel.appendChild(opt);
			for (let i=0; i<sel.childNodes.length; i++) {
				let c = sel.childNodes[i];
				if (c.value == sel.dataset.val) sel.selectedIndex = i;
			}
			return opt;
		}
		function S() {
			let l = window.location;
			if (l.protocol == "file:") {
				loc = true;
				locip = localStorage.getItem('locIp');
				if (!locip) {
					locip = prompt("File Mode. Please enter WLED IP!");
					localStorage.setItem('locIp', locip);
				}
			} else {
				// detect reverse proxy
				let path = l.pathname;
				let paths = path.slice(1,path.endsWith('/')?-1:undefined).split("/");
				if (paths.length > 2) {
					locproto = l.protocol;
					loc = true;
					locip = l.hostname + (l.port ? ":" + l.port : "") + "/" + paths[0];
				}
			}
			loadJS(getURL('/settings/s.js?p=2'), false);	// If we set async false, file is loaded and executed, then next statement is processed
			if (loc) d.Sf.action = getURL('/settings/leds');
		}
		function getURL(path) {
			return (loc ? locproto + "//" + locip : "") + path;
		}
	</script>
	<style>@import url("style.css");</style>
</head>
<body onload="S()">
	<form id="form_s" name="Sf" method="post">
		<div class="toprow">
		<div class="helpB"><button type="button" onclick="H()">?</button></div>
		<button type="button" onclick="B()">Back</button><button type="submit">Save</button><hr>
		</div>
		<h2>LED &amp; Hardware setup</h2>
		Total LEDs: <span id="lc">?</span> <span id="pc"></span><br>
		<i>Recommended power supply for brightest white:</i><br>
		<b><span id="psu">?</span></b><br>
		<span id="psu2"><br></span>
		<br>
		Enable automatic brightness limiter: <input type="checkbox" name="ABen" onchange="enABL()" id="able"><br>
		<div id="abl">
			Maximum Current: <input name="MA" type="number" class="l" min="250" max="65000" oninput="UI()" required> mA<br>
			<div id="ampwarning" class="warn" style="display: none;">
				&#9888; Your power supply provides high current.<br>
				To improve the safety of your setup,<br>
				please use thick cables,<br>
				multiple power injection points and a fuse!<br>
			</div>
			<i>Automatically limits brightness to stay close to the limit.<br>
			Keep at &lt;1A if powering LEDs directly from the ESP 5V pin!<br>
			If you are using an external power supply, enter its rating.<br>
			(Current estimated usage: <span class="pow">unknown</span>)</i><br><br>
			LED voltage (Max. current for a single LED):<br>
			<select name="LAsel" onchange="enLA()">
				<option value="55" selected>5V default (55mA)</option>
				<option value="35">5V efficient (35mA)</option>
				<option value="30">12V (30mA)</option>
				<option value="255">WS2815 (12mA)</option>
				<option value="50">Custom</option>
			</select><br>
			<span id="LAdis" style="display: none;">Custom max. current per LED: <input name="LA" type="number" min="0" max="255" id="la" oninput="UI()" required> mA<br></span>
			<i>Keep at default if you are unsure about your type of LEDs.</i><br>
		</div>
		<h3>Hardware setup</h3>
		<div id="mLC">LED outputs:</div>
		<hr class="sml">
		<button type="button" id="+" onclick="addLEDs(1,false)">+</button>
		<button type="button" id="-" onclick="addLEDs(-1,false)">-</button><br>
		LED Memory Usage: <span id="m0">0</span> / <span id="m1">?</span> B<br>
		<div id="dbar" style="display:inline-block; width: 100px; height: 10px; border-radius: 20px;"></div><br>
		<div id="ledwarning" class="warn" style="display: none;">
			&#9888; You might run into stability or lag issues.<br>
			Use less than <span id="wreason">800 LEDs per output</span> for the best experience!<br>
		</div>
		<hr class="sml">
		Make a segment for each output: <input type="checkbox" name="MS"><br>
		Custom bus start indices: <input type="checkbox" onchange="tglSi(this.checked)" id="si"><br>
		Use global LED buffer: <input type="checkbox" name="LD" onchange="UI()"><br>
		<hr class="sml">
		<div id="color_order_mapping">
			Color Order Override:
			<div id="com_entries"></div>
			<hr class="sml">
			<button type="button" id="com_add" onclick="addCOM()">+</button>
			<button type="button" id="com_rem" onclick="remCOM()">-</button><br>
		</div>
		<hr class="sml">
		<div id="btns"></div>
		Disable internal pull-up/down: <input type="checkbox" name="IP"><br>
		Touch threshold: <input type="number" class="s" min="0" max="100" name="TT" required><br>
		IR GPIO: <input type="number" min="-1" max="48" name="IR" onchange="UI()" class="xs"><select name="IT" onchange="UI()">
		<option value=0>Remote disabled</option>
		<option value=1>24-key RGB</option>
		<option value=2>24-key with CT</option>
		<option value=3>40-key blue</option>
		<option value=4>44-key RGB</option>
		<option value=5>21-key RGB</option>
		<option value=6>6-key black</option>
		<option value=7>9-key red</option>
		<option value=8>JSON remote</option>
		</select><span style="cursor: pointer;" onclick="off('IR')">&nbsp;&#x2715;</span><br>
		Apply IR change to main segment only: <input type="checkbox" name="MSO"><br>
		<div id="json" style="display:none;">JSON file: <input type="file" name="data" accept=".json"><button type="button" class="sml" onclick="uploadFile('/ir.json')">Upload</button><br></div>
		<a href="https://kno.wled.ge/interfaces/infrared/" target="_blank">IR info</a><br>
		Relay GPIO: <input type="number" min="-1" max="48" name="RL" onchange="UI()" class="xs"> Invert <input type="checkbox" name="RM"><span style="cursor: pointer;" onclick="off('RL')">&nbsp;&#x2715;</span><br>
		<hr class="sml">
		<h3>Defaults</h3>
		Turn LEDs on after power up/reset: <input type="checkbox" name="BO"><br>
		Default brightness: <input name="CA" type="number" class="m" min="0" max="255" required> (0-255)<br><br>
		Apply preset <input name="BP" type="number" class="m" min="0" max="250" required> at boot (0 uses defaults)
		<br><br>
		Use Gamma correction for color: <input type="checkbox" name="GC"> (strongly recommended)<br>
		Use Gamma correction for brightness: <input type="checkbox" name="GB"> (not recommended)<br>
		Use Gamma value: <input name="GV" type="number" class="m" placeholder="2.8" min="1" max="3" step="0.1" required><br><br>
		Brightness factor: <input name="BF" type="number" class="m" min="1" max="255" required> %
		<h3>Transitions</h3>
		Crossfade: <input type="checkbox" name="TF"><br>
		Effect blending: <input type="checkbox" name="EB"><br>
		Transition Time: <input name="TD" type="number" class="xl" min="0" max="65500"> ms<br>
		Enable Palette transitions: <input type="checkbox" name="PF"><br>
		<i>Random Cycle</i> Palette Time: <input name="TP" type="number" class="m" min="1" max="255"> s<br>
		<h3>Timed light</h3>
		Default Duration: <input name="TL" type="number" class="m" min="1" max="255" required> min<br>
		Default Target brightness: <input name="TB" type="number" class="m" min="0" max="255" required><br>
		Mode:
		<select name="TW">
			<option value="0">Wait and set</option>
			<option value="1">Fade</option>
			<option value="2">Fade Color</option>
			<option value="3">Sunrise</option>
		</select>
		<h3>White management</h3>
		White Balance correction: <input type="checkbox" name="CCT"><br>
		<div id="wc">
			Global override for Auto-calculate white:<br>
			<select name="AW">
				<option value=255>Disabled</option>
				<option value=0>None</option>
				<option value=1>Brighter</option>
				<option value=2>Accurate</option>
				<option value=3>Dual</option>
				<option value=4>Max</option>
			</select>
			<br>
			Calculate CCT from RGB: <input type="checkbox" name="CR"><br>
			CCT additive blending: <input type="number" class="s" min="0" max="100" name="CB" required> %
		</div>
		<h3>Advanced</h3>
		Palette blending:
		<select name="PB">
			<option value="0">Linear (wrap if moving)</option>
			<option value="1">Linear (always wrap)</option>
			<option value="2">Linear (never wrap)</option>
			<option value="3">None (not recommended)</option>
		</select><br>
		Target refresh rate: <input type="number" class="s" min="1" max="120" name="FR" required> FPS
		<hr class="sml">
		<div id="cfg">Config template: <input type="file" name="data2" accept=".json"><button type="button" class="sml" onclick="loadCfg(d.Sf.data2)">Apply</button><br></div>
		<hr>
		<button type="button" onclick="B()">Back</button><button type="submit">Save</button>
	</form>
	<div id="toast"></div>
</body>
</html>
